Bloomberg Accor SA, Europe’s biggest hotel operator, is expanding its luxury vacation-rental offering with listings in the Hamptons, Wall Street’s summer playground. The Long Island rentals cost as much as $2 million for the season and are the first launches in the Collections portfolio of Accor’s onefinestay unit, according to a company statement. More sites will be added over …

  Bloomberg Luxury developer Toll Brothers Inc. has a deal for those shopping for a condo in Manhattan: buy something soon, and we’ll pay the taxes on your purchase. The publicly traded homebuilder is offering to pay the city transfer tax and the New York state “mansion tax” — an effective discount totaling almost 2.5 percent — on deals made …

  Bloomberg A UK energy-storage startup is aiming to take on Tesla Inc. in the competition to outfit homes with affordable back-up battery power. Powervault Ltd. is preparing to boost production of its lead- and lithium-ion batteries, said Managing Director Joe Warren. The London-based company is targeting sales of 50,000 units a year by 2020, up from about 1,000 this …